Deadbolt locks are the first line of defense in home security.

Here is how to install a deadbolt lock in a steel exterior door for added security.

First, determine the height where your deadbolt lock will be installed.

Make certain the placement doesn’t interfere with the latch on your storm or screen door.

The deadbolt should be above the door knob.

Use the template provided by the manufacturer to mark the center of the deadbolt location on the door.

Then, use the template to mark a hole on the side of the door for the latch.

Most exterior doors are steel sided with wood cores.

Use a hole saw designed to drill through steel to cut a hole for the deadbolt lock.

Use a spade bit to cut a hole into the side of the door for the latch.

Then implement the deadbolt through the door and attach each end with long screws.

Check out the video above for the full step-by-step instructions.

How to Install a Deadbolt Lock on a Steel Door| essortment (YouTube)